[rules-users] Compilation errors with 5.3.0.CR1
Wacław Borowiec
wborowiec at proximetry.pl
Wed Oct 5 08:25:44 EDT 2011
Thanks for your answer Thomas. It showed that this construct works fine
either way with 5.3.0.CR1, but it's other rule that causes the error:
rule "restriction number paramId: 1, id: 0"
when
$param : EmParamValue(id == 1, enabled == true)
$def : EmParamDefinition(this == $param.paramDefinitionId)
$cust : EmCustomParamDefinition(this == $param.customParamDef)
$constr: EmNumberConstraint(this == $cust.constraints)
$restr: EmNumberRestriction(this == $constr.restrictions[0], min <=
$param.requiredValue, max >= $param.requiredValue)
then
EmRulesUtils.logRuleExecution(kcontext);
result.addValidParam($param);
end
and DRL error:
[DialectError message='Unable to wire compiled classes, probably related
to compilation
failures:sun.reflect.generics.reflectiveObjects.WildcardTypeImpl cannot
be cast to java.lang.Class']
It compiles successfully when I remove
this == $constr.restrictions[0]
part from last line of LHS.Again, it worked well in 5.1.1.
On 10/05/2011 12:14 PM, Swindells, Thomas wrote:
> Why do you need the and in the rule?
> Have you tried
>
>> rule "enabled paramId: 1, id: 0"
>> salience 50
>> when
> def0: EmParamDefinition(paramName == "p2", listIndex == -1)
> EmParamValue(paramDefinitionId == def0, requiredValue == 1)
> $param : EmParamValue(id == 1, enabled == false)
> not ParentDisabled(id == 1)
> then
> $param.setEnabled(true);
> update($param);
> end
>
> Thomas
>
>> -----Original Message-----
>> From: rules-users-bounces at lists.jboss.org [mailto:rules-users-
>> bounces at lists.jboss.org] On Behalf Of Waclaw Borowiec
>> Sent: 05 October 2011 10:55
>> To: rules-users at lists.jboss.org
>> Subject: [rules-users] Compilation errors with 5.3.0.CR1
>>
>> Hello
>>
>> I'm sending the message once again due to problems with code samples
>> visibility in the previous one.
>>
>> I've got following rule:
>>
>> rule "enabled paramId: 1, id: 0"
>> salience 50
>> when
>> (def0: EmParamDefinition(paramName == "p2", listIndex == -1) and
>> EmParamValue(paramDefinitionId == def0, requiredValue == 1))
>> $param : EmParamValue(id == 1, enabled == false)
>> not ParentDisabled(id == 1)
>> then
>> $param.setEnabled(true);
>> update($param);
>> end>
>>
>> It compiles fine under Drools 5.1.1, but after switching to 5.3.0.CR1 I get
>> following exception:
>>
>> [Error: unexpected end of statement]
>> [Near : {... def ....}]
>> ^
>> [Line: 1, Column: 4]
>> at
>> org.mvel2.compiler.AbstractParser._captureBlock(AbstractParser.java:1470)
>> at
>> org.mvel2.compiler.AbstractParser.captureCodeBlock(AbstractParser.java:14
>> 46)
>> at org.mvel2.compiler.AbstractParser.nextToken(AbstractParser.java:421)
>> at
>> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:1
>> 28)
>> at
>> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62
>> )
>> at org.mvel2.MVEL.analysisCompile(MVEL.java:668)
>> at org.mvel2.MVEL.analysisCompile(MVEL.java:672)
>> at
>> org.drools.rule.builder.PatternBuilder.setInputs(PatternBuilder.java:854)
>> at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:595)
>> at
>> org.drools.rule.builder.PatternBuilder.processConstraintsAndBinds(PatternB
>> uilder.java:397)
>> at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:309)
>> at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:132)
>> at
>> org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.jav
>> a:65)
>> at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:80)
>> at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:2241)
>> at
>> org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:802)
>> at
>> org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java
>> :388)
>> at
>> org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder
>> .java:566)
>> at
>> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.ja
>> va:35)
>> at
>> com.proximetry.elmgr.services.DependenciesBean$Expander.addDrl(Depen
>> denciesBean.java:110)
>>
>>
>> It is
>>
>> (def0: EmParamDefinition(paramName == "p2", listIndex == -1) and
>> EmParamValue(paramDefinitionId == def0, requiredValue == 1))
>>
>>
>> line that causes the problem - the exeption disappears after removing it.
>> What's interesting, when I add '$' sign to binding variable name, and the line
>> looks like:
>>
>> ($def0: EmParamDefinition(paramName == "p2", listIndex == -1) and
>> EmParamValue(paramDefinitionId == $def0, requiredValue == 1))
>>
>>
>> instead of the exception I get DRL error:
>>
>> [DialectError message='Unable to wire compiled classes, probably related to
>> compilation failures:sun.reflect.generics.reflectiveObjects.WildcardTypeImpl
>> cannot be cast to java.lang.Class']
>>
>>
>> For completness, this is how I add DRL resources:
>>
>> public void addDrl(Reader rdr) {
>> KnowledgeBuilder kBuilder =
>> KnowledgeBuilderFactory.newKnowledgeBuilder();
>>
>> kBuilder.add( ResourceFactory.newReaderResource(rdr),
>> ResourceType.DRL);
>> if( kBuilder.hasErrors() ){
>> for( KnowledgeBuilderError err: kBuilder.getErrors() ){
>> StackTrace.error(this, err);
>> }
>> throw new IllegalStateException( "DRL errors" );
>> }
>> knowledgeBase.addKnowledgePackages(
>> kBuilder.getKnowledgePackages() );
>> }
>>
>>
>> I would be grateful if someone has an idea, why after switching Drools
>> version such problem exists.
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>
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